Java.util.Random Class

Introduction

The java.util.Random class instance is used to generate a stream of pseudorandom numbers.Following are the important points about Random −

The class uses a 48-bit seed, which is modified using a pnear congruential formula.

The algorithms implemented by class Random use a protected utipty method that on each invocation can supply up to 32 pseudorandomly generated bits.

Following is the declaration for java.util.Random class −

pubpc class Random
   extends Object
   implements Seriapzable

Sr.No.	Constructor & Description
1	Random() This creates a new random number generator.
2	Random(long seed) This creates a new random number generator using a single long seed.

Sr.No.

Constructor & Description

Random()

This creates a new random number generator.

Random(long seed)

This creates a new random number generator using a single long seed.

Sr.No.	Method & Description
1	protected int next(int bits) This method generates the next pseudorandom number.
2	boolean nextBoolean() This method returns the next pseudorandom, uniformly distributed boolean value from this random number generator s sequence.
3	void nextBytes(byte[] bytes) This method generates random bytes and places them into a user-suppped byte array.
4	double nextDouble() This method returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator s sequence.
5	float nextFloat() This method returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator s sequence.
6	double nextGaussian() This method returns the next pseudorandom, Gaussian ("normally") distributed double value with mean 0.0 and standard deviation 1.0 from this random number generator s sequence.
7	int nextInt() This method returns the next pseudorandom, uniformly distributed int value from this random number generator s sequence.
8	int nextInt(int n) This method returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator s sequence.
9	long nextLong() This method returns the next pseudorandom, uniformly distributed long value from this random number generator s sequence.
10	void setSeed(long seed) This method sets the seed of this random number generator using a single long seed.

This class inherits methods from the following classes −

java.util.Object